|Date|Opponent#|Rank#|Site|Result|Attendance|
|---|---|---|---|---|---|
|September 12|#1 Michigan||Camp Randall Stadium • Madison, WI|W 21–14|68,733|
|September 19|#9 UCLA*|#20|Camp Randall Stadium • Madison, WI|L 13–31|71,496|
|September 26|Western Michigan*||Camp Randall Stadium • Madison, WI|W 21–10|67,196|
|October 3|Purdue||Camp Randall Stadium • Madison, WI|W 20–14|68,603|
|October 10|#18 Ohio State||Camp Randall Stadium • Madison, WI|W 24–21|78,973|
|October 17|at Michigan State|#14|Spartan Stadium • East Lansing, MI|L 14–33|67,352|
|October 24|at Illinois||Memorial Stadium • Champaign, IL|L 21–23|67,413|
|October 31|Northwestern||Camp Randall Stadium • Madison, WI|W 52–0|70,035|
|November 7|at Indiana||Memorial Stadium • Bloomington, IN|W 28–7|44,218|
|November 14|Iowa||Camp Randall Stadium • Madison, WI|L 7–17|78,731|
|November 21|at Minnesota||Memorial Stadium • Minneapolis, MN (Paul Bunyan's Axe)|W 26–21|47,125|
|December 13|vs. Tennessee*||Giants Stadium • East Rutherford, NJ (Garden State Bowl)|L 21–28|53,220|

Question: how many of the 1981 games were played at home?
Answer: 7